FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
Dongfang_Li_FTNT
Article Id 329151
Description

This article describes that when a Fortinet device is in an Air-Gap environment, it can upload the entitlement file to keep the device to check the license. The user might have different Fortinet devices such as FortiGate, FortiManager, FortiAnalyzer,…

Scope Fortinet Devices.
Solution

When Fortinet devices are under the same user account, all Fortinet devices share the same entitlement file.  

The entitlement file can be downloaded to support.fortinet.com. Log in to the website, go to Asset Management -> Product, and select Export Entitlement:

 

Entitlement file.PNG

 

Note: If the device is not in the Air-Gap environment anymore, it is not necessary to remove the entitlement file. As long as the device has Internet access, the FortiGate can connect to the Internet for FortiGuard update as usual.